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@uitrit tartes @anni @Him VIiftrftoiBMPNT.11i VALVE-GEAR.

@in tlgehgtlt :sterren tn 'in tigen tttets ntent mit milking graft nftigt samt,

TOALL-,WHOM .I'l MAY CONCERN: y

Beit known that I, JOHN F. ALLE, of the citytcouuty, sind State'of New York, have ,invented a certain new and useful Improvementfin the Valve-Gear .of 'Steam-Engines, of which the following is a full,.c'lea.r, and exact description, reference being had` to theaccompanying drawing, forming port of this' specification, and in which- Figurel represents n. side velevation of a horizontal engi-ne, in port, with my improvement applied to it, and

Figure 2 a. plan of the same. l r I Like letters indicate corresponding parts in bothgures. f

y"lhe'nature of my invention consistsl in novel means for. automatically controlling or rendering uniform -the motion 'of the engineby a combination of' governor, link-motion, and wrist-motion, caused' to bear or act upon the induction-.valves ot' the engine. Y A i i Referring to the accompanying. drawing, A represents the frame, B the cylinder of a horizontal engine,

and-C" its steam-box or chamber, containing the induction-valves, which Indy be ordinary sliding blocks, controlling the ports, and to'which a, a aiethe rods. The reduction-valves may be separately arranged, and operated-in any suitable inanner,4 and the induction-valves be of any other appropriate form than that here suggested. D -is'tle governor ofthe engineLwhich may be of the usual-ball or other'description, and E the engine-shaft, ori which are hung two eccentrics, F F', for operating, by their respective rods, b b', the link-motion G, of which c is the link, and d-t'he rock-shaft, in gear therewith by a. crank, e. The governor is connected tothe one, b, of these rods, say, by a roll, s, to controlthe position of the link. Motion fromthisrock-shaft dis communicated to the induction-valve rods a a', through con nectingrods e ef, by a vvri`st-mo`tion, H, ofwhichff are the wrists, :attached to an arm, arms, or projection, g, from the' rockshitft o, and arranged, the one above andthe other belown horizontal line intersecting the rock-shaft. i

The advantages of this combination maybe briefly stated, as follows: The wrist-motion dispenses with rauch 'lap to the valves, even where an extreme cut-0H' action is required, while the' link-motion furnishes a quick and extensive range of action, producing na inotion of the valves when' the'wristpin of the crank'e is midway between the junctionwiththe link c of theveceentric-'rodsb' that pull or thrustin opposite directions'simultanebusly, and exercising a considerable action on the valve-rods as the linkis shifted' to geitr, at or towards its `end,`with theel-ank e, thus }est:iblishing a. susceptibility or sensibility, ythat is, the link and wrist-motions, which, when the latter are combined with agovernor, secures to the engine a. perfect und immediateeven in `quickrunning engines-automatic control of the. induction-valves.

What 'I claim as my invention, and 4desire to secureiby Letters Patent, is-

The arrangement of the governor and 1ink-motion,-with reference'to the wrist-motion,'constructed as described, to producean automatic control of the induction-valves, substantially as specified.

JOHN'F. ALLEN.

Witnesses:

J. W. CooMBs, G. W. REED. 

